Define a pointer: include a * before the name of the variable.
Get the address: use &.
#include <stdio.h>
main ()
{ int i; int * ia;
i = 10;
ia = &i;
printf (" The address of i is %8u \n", ia);
printf (" The value at that location is %d\n", i);
printf (" The value at that location is %d\n", *ia);
*ia = 50;
printf ("The value of i is %d\n", i);
}
The address of i is 631672
The value at that location is 10
The value at that location is 10
The value of i is 50